VITODENS 200 WB2A - Heatingspares247.com

3 Installation Requirements3.3 Flue Terminal LocationDetailed recommendations for flue installation are given in BS 5440:1. The followingnotes are for general guidance.a) The boiler MUST be installed so that the terminal is exposed to external air.b) It is important that the position of the terminal allows free passage of airacross it at all times.c) It is ESSENTIAL TO ENSURE that products of combustion discharging fromthe terminal cannot re-enter the building or any other adjacent building,through ventilators, windows, doors, other sources of natural air infiltrationor forced ventilation / air conditioning.d) The minimum acceptable dimensions from the terminal to obstructions andventilation openings are specified in Figure 3/A.(BS 5440 Part 1)e) If the terminal discharges into a pathway or passageway check thatcombustion products will not cause nuisance and that the terminal will notobstruct the passageway.f) Where the lowest part of the terminal is fitted less than 2m (78in) aboveground, above a balcony or above a flat roof to which people have access,the terminal MUST be protected by a purpose designed guard. (Available asan optional extra).g) Where the terminal is fitted within 850mm (34in) of a plastic or paintedgutter, or 450mm (18in) of painted eaves, an aluminium shield at least750mm long must be fitted to the underside of the painted surface.h) The air inlet / flue outlet duct MUST NOT be closer that 25mm (1in) tocombustible material.i) In certain weather conditions the terminal may emit a plume of steam. Thisis normal but positions where this would cause a nuisance should beavoided.13